Step Blocks for 1/4" or 5/16" Bolt and T-Track

thingiverse

I wanted some fairly low-profile step blocks for holding material in place, but on the drill-table I built for my bench drill-press, and for my CNC machine. These will work with standard 1/4" and 5/16" bolts, and are pictured with 1/4-20 bolts in some T-track bought from amazon, which I used for my drill-press table. I was inspired by the low-profile step-blocks by UltiArjan here https://www.thingiverse.com/thing:1744734 but re-designed these from scratch in Fusion 360 to accept 1/4" and 5/16" bolts, There are two versions of the step-block. One for a range of 8mm to 20mm of work height (with the clamp horizontal), and another with a range of 18mm to 30mm. If anyone needs an even taller version then let me know (it's perfectly fine to have the clamp at a slight slope) I suggest printing the step-blocks with 3 perims, at standard 0.2mm layer height, and with 30% gyroid infill for stability. I recommend printing the clamp at 100% rect infill for extra rigidity. The clamp is expected to flex a little while clamping, so I'd suggest a filament that's not too brittle (I use Fusion HTPLA, though PETG may work well also) (Note that the version in the photos has a shorter slot in the step-block, which can limit the reach from the T-tracks or other fixing points, so I extended that slot)